/* Poly1305Do writes the Poly1305 authenticator of the given additional data
* and ciphertext to |out|. */
static void
Poly1305Do(unsigned char *out,
const unsigned char *ad, unsigned int adLen,
const unsigned char *ciphertext, unsigned int ciphertextLen,
const unsigned char key[32])
{
poly1305_state state;
unsigned int j;
unsigned char lengthBytes[8];
unsigned int i;
Poly1305Init(&state, key);
j = adLen;
for (i = 0; i < sizeof(lengthBytes); i++) {
lengthBytes[i] = j;
j >>= 8;
}
Poly1305Update(&state, ad, adLen);
Poly1305Update(&state, lengthBytes, sizeof(lengthBytes));
j = ciphertextLen;
for (i = 0; i < sizeof(lengthBytes); i++) {
lengthBytes[i] = j;
j >>= 8;
}
Poly1305Update(&state, ciphertext, ciphertextLen);
Poly1305Update(&state, lengthBytes, sizeof(lengthBytes));
Poly1305Finish(&state, out);
}
void bench_poly1305()
{
Poly1305 enc;
byte mac[16];
double start, total, persec;
int i;
int ret;
ret = Poly1305SetKey(&enc, key, 32);
if (ret != 0) {
printf("Poly1305SetKey failed, ret = %d\n", ret);
return;
}
start = current_time(1);
for(i = 0; i < numBlocks; i++)
Poly1305Update(&enc, plain, sizeof(plain));
Poly1305Final(&enc, mac);
total = current_time(0) - start;
persec = 1 / total * numBlocks;
#ifdef BENCH_EMBEDDED
/* since using kB, convert to MB/s */
persec = persec / 1024;
#endif
printf("POLY1305 %d %s took %5.3f seconds, %7.3f MB/s\n", numBlocks,
blockType, total, persec);
}
